Manufacture of door-knobs



(No Model.) W. I. ALVORD.

MANOPAOTORE 0F DOOR KNOBS.

No. 305,560. Patented Sept 23, 1884-.

wjfnessm lawenfar willi'ian I. flil/ orcl UNITED STATES PATENT Creme.

WILLISTON I. ALVORD, OF BRIDGEPORT, CONNECTICUT.

MANUFACTURE OF DOOR-KNOBS.

SPECIFICATION forming part of Letters Patent No. 305,560, datedSeptember 23,1884.

Application filed February 4, 1884. (No model.)

To all whom, it may concern:

Be it known that I, WILLISTON I. ALVORD, a citizen of the United States,residing at Bridgeport, in the county of Fairfield and State ofConnecticut, have invented certain new and useful Improvements inDoor-Knobs and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

My invention relates to certain novel and useful improvements in knobsfor doors, 850., and has for its object to provide a knob whoseconstruction shall be cheap and simple, and which shall embody theadvantages set forth in applications designated as A and B, and filed onan even date herewith, and also the advantage that any rotary motionapplied to the front of the knob is imparted directly to the spindleitself; and with these ends in view my invention consists in the detailsof construction and combination of elements hereinafter fully and indetail set forth, and then specifically designated by the claim.

In order that those skilled in the art to which my invention appertainsmay more fully understand its construction and know how to make and usemy improvement, I will proceed to describe the same in detail, referringby letter to the accompanying drawing, forming a part of thisspecification, which shows a central section of my improved doorknobproperly assembled.

A is the front shell, of cast metal, having a flange, B, around itsedge; and C is a hollow shank, cast integral with said shell, andadapted to receive the spindle.

D is the rear shell, of cast metal, provided at its center with a holeof sufficient size to readily admit the entrance of the shank. The shellD is provided with a. flange, E, similar to the flange B.

F is a sleeve of thin sheet metal, adapted to surround the free end ofthe shank.

G; is a'sheet-metal cup or sheath, adapted to conform to the contour ofthe rear shell, D, and provided at its center with a hole ofsufficientsize to admit the passage of the shank, and with an annularrecess, II, in its inner circumference, adapted to fit closely over theflange E.

I is a cap of sheet metal, adapted to the external contour of the frontshell, A. This cap is so constructed that when the several parts of theknob are assembled the inner edge of said cap will extend beyond theannular recess in the casing of the rear shell, for the purposepresentlyexplained.

In assembling the parts of my improved knob, the sleeve F having beenplaced in position over the end of the shank, the rear shell, D, is thenslipped over the shank until its outer edge abuts against the inner edgeof the shell A. The sheath is then placed over the shell D. The cap I isthen placed over the front shell, A, and its lower edge turned byspinning beading or otherwise underneath the shoulder of the annularrecess H, thus securely binding the rear shell and its covering to thefront shell, A.

In applications A and B, filed on an even' date herewith, I have shownand described two constructions of knobs, one with the body cast in asingle form and the other with the front and rear shells separate, butwith the shank forming a part of the rear shell; and I do not wish to beunderstood as laying claim in this application to either of thoseconstruetions.

Having thus described my invention, what I claim as new, and desire tosecure by Let-- ters Patent, is

The method herein described of making doorknobs, the same consisting informing the body of the knob of two independent cast-metal shellsconformed externally to the contour of underneath the fiange'and againstthe sheath,

substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

YVILLISTON I. ALY ORD.

XVitn esses- 2 S. S. WILLIAMsON, WILLIAM J. HAVILAND.

